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In prehistoric times, the physical changes in response to stress were an essential adaptation for meeting natural threats. Even in the modern world, the stress response can be an asset for raising levels of performance during critical events such as a sports activity, an important meeting, or in situations of actual danger or crisis. If stress becomes persistent and low-level, however, all parts of the body's stress apparatus (the brain, heart, lungs, vessels, and muscles) become chronically over- or under-activated. This may produce physical or psychologic damage over time. Acute stress can also be harmful in certain situations.

+Neurosis is a name for a group of diseases that causes slight handicap to brain functions. It is an ailment of spiritual or psychic nature instead of physical, so it falls into the category of psychological impediment. It is light in serenity and consists of a couple of diseases instead of one. Generally, neurosis can be divided into neurasthenia, anxiety, oppression, phobia, hysteria, depression, and hypochondriasis. Let us examine the most commonly seen types within the college community.
+Neurasthenia, or neurasthenic neurosis, is the slightest of its kind that will not cause physical diseases and depression. It happens mostly on the students or when they are finding a job. It is especially the case among youngsters and youth intellectuals. The usual symptoms are fatigue, bad sleep, headache, distractibility, forgetfulness, low spirit, and bad appetite. As a result, the patients get a low efficiency in working and studying.
+Anxiety, or anxiety neurosis, is a bad fit of terror and worry because of consecutive overstrain of nerves. It causes automatic neural dysfunction, together with nausea, palpitation, respiratory difficulty, dry mouth, frequent urination, urgent urination and sweating. This is common on the occasion of exams, such as the college entrance examination.
+Compulsive neurosis, or oppressive neurosis, is a kind of neurosis centered on self-oppression. Subjectively, it is a feeling of some uncontrollable ideas, emotion, propensity and behavior. Although the patient knows that they are meaningless, they can hardly compose themselves. As a result, they are filled with inner collision together with a strong sense of anxiety and terror. For example, they often wash their hands, worry about the doors and unable to dismiss some thoughts.
+Phobia, or phobia neurosis, is an experience of immense fear or anxiety toward a certain environment or object. It is characterized by persisting and unnecessary fear concerning some particular objects, action and situations. In response, the patient will take an evasive attitude and cannot control himself. In reality, it is displayed in different forms such as heterophobia, zoophobia, and crowd phobia, school phobia.
Depression. This is a neurosis feature persisting depression combined with anxiety, emptiness, fatigue, unfitness, and sleeping difficulty. The common symptoms are: (a) feel depressed, dispirited, melancholy, dejected; (b) getting disinterested in daily activities; (c) despondent of future; (d) tend to see the bad side of everything; (e) feel sluggish, slow in thinking and acting; (f) worse self-evaluation; (g) unwilling to initiate a relation with others, but behave normally when they are approached; (h) sometimes filled with the thought of death, but inner mind is filled with contradiction, agitation and irritation; (i) think themselves seriously ill and are eager to get cured. The physical dispositions are fatigue, headache, palpitation, ringing ears, tight chest, abdominal distention, constipation, insomnia, dreaminess, bad appetite, distractibility, and memory deterioration, etc. These symptoms can either ease off or even disappear depending on how good the emotion is. Hypochondriasis is a state of vexes and weariness in which one is too concerned with his health and stubbornly thinks he has contracted some serious disease. Most significantly, the patient pays too much attention to his fitness or his body function. He always develops a strong suspicion that he has either physical or mental problems, which is in direct contradiction with the truth, and he will stick to his bias even in front of doctor!—s explanation or diagnosis.

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